Note The CMS database maintenance runs at the scheduled time only when the following three conditions are satisfied:

•The last vacuum process happened more than 30 minutes in the past.

•The percent increase in disk space usage is greater than 10 percent.

•The available free disk space is greater than 10 percent of the total disk space.

If any of these conditions are not satisfied, the CMS database maintenance does not run at the scheduled time, and the show cms database maintenance EXECcommand output states, "Database maintenance is not running."

Scheduling a CMS Maintenance Routine Using the CLI

To schedule maintenance of the CMS database, use the cms database maintenance global configuration command. You can do a routine full maintenance cleaning ("vacuuming") or a regular maintenance reindexing of the embedded database. The full maintenance routine runs only when the disk is more than 90 percent full and runs only once a week. When you clean the tables, the reusable space is returned to the database system.

The cms enable command automatically registers the node in the database management tables and enables the CMS. The no cms enable command only stops the management services on the device and does not disable a primary sender. You can use the cms deregister command to remove a primary or backup sender Content Engine from the ACNS network and to disable communication between the two multicast senders.